package filter;


import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;



/**
 *
 * @author tgiunipero
 */
@WebFilter(servletNames = {"Controller"})
public class SessionTimeoutFilter implements Filter
{
    @Override
    public void init(FilterConfig filterConfig) throws ServletException
    {
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
    {

        HttpServletRequest req = (HttpServletRequest) request;
        HttpServletResponse resp = (HttpServletResponse) response;
        
        HttpSession session = req.getSession(false);

        if (session == null) {
            resp.sendRedirect("index");
        }
        else
        {
            chain.doFilter(request, response);
        }
    }
    
    @Override
    public void destroy()
    {
    }
}